EP1463639B1 - Rotating head - Google Patents

Rotating head Download PDF

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Publication number
EP1463639B1
EP1463639B1 EP03729503A EP03729503A EP1463639B1 EP 1463639 B1 EP1463639 B1 EP 1463639B1 EP 03729503 A EP03729503 A EP 03729503A EP 03729503 A EP03729503 A EP 03729503A EP 1463639 B1 EP1463639 B1 EP 1463639B1
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EP
European Patent Office
Prior art keywords
rotating head
rotating
ball
tongue
head
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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EP03729503A
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German (de)
French (fr)
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EP1463639A1 (en
Inventor
Friedrich Di Schachter
Anne Hf Schmitz
David Hm Schmitz
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BIC SA
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BIC SA
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K1/00Nibs; Writing-points
    • B43K1/08Nibs; Writing-points with ball points; Balls or ball beds
    • B43K1/084Ball beds

Definitions

  • the invention relates to a device designated as a rotating head for the deformation of the edge of ballpoint pen tips, comprising two rotary rollers freely rotatable in the rotary head, which have forming discs which delimit between them a slot in which protrudes from a V-shaped front face tongue that can be moved against a spring.
  • the balls When assembling hard balls of ballpoint pens in their seat of the writing tip consisting of moldable material of the ballpoint pen, the balls are first inserted into a substantially cylindrical blind hole and then the edge of the tip of the ballpoint pen. writing that protrudes above the equator of the ball, is flanged by plastic deformation so as to surround and hold the ball in the area "above” the equator.
  • the hole in which the ball is seated has in the area of its bottom pockets or grooves through which the writing liquid, hereinafter referred to as "ink” for simplicity, is transported. It is also not a true blind hole, because from its bottom a bore of a diameter smaller than that of the ball leads to the reserve of ink.
  • the clamping device called rotary head has two rods arranged parallel to one with respect to the other oriented in the vertical direction. These support at their lower ends circular shaped hard forming discs which tapering substantially cone downwards.
  • the entire rod and forming disk is called a rotating roller and is installed so that it can rotate freely.
  • the peripheries of the forming discs have a small gap in the form of a slit. In this slot is disposed in the center a thin tongue and thin V-shaped front surface that can move axially against a spring.
  • the rotating head is rotatable about the axis of symmetry of the two shafts of the forming discs and is also rotated about this axis.
  • the operating mode is as follows: A writing tip with its ball is guided coaxially with respect to the axis of rotation of the rotating head in the slot between the forming discs and the ball then comes into contact first. with the V-shaped front surface. This ensures a safe centering and positioning of the ball and the writing tip in the plane of the tongue.
  • the tongue is then offset against its spring and the writing tip comes into contact with the forming discs installed so as to be able to pivot freely. This causes centering in the plane normally with respect to the plane of the tongue.
  • the axial compression of the writing tip and the rotating head against each other is done with a predefined force and with a predefined number of relative rotations. The relative movement between the writing tip and the rotating head causes the rotational offset of the forming discs.
  • This device nevertheless has a disadvantage that is due to predefined geometric size ratios within narrow limits of the different parts. Due to the fact that the two shafts are oriented parallel to the forming discs, it is not possible, even with extreme miniaturization and using special bearings to be mounted flat in the radial direction, to obtain a difference between the two axes of rotation. which is less than about 10 mm. The diameters of the forming discs are thus also necessarily fixed respectively at about 10 mm.
  • the writing tip usually has a diameter of about 0.6 to 1.2 mm in the area of its edge and is therefore strongly curved.
  • the ratios of the writing tip bends: forming disc thus range from about 1: 16 to 1: 8. These size ratios result in a relatively large contact area and thus a low Hertz surface pressure. With a higher Hertz surface pressure, a better "kneading" of the material of the writing tip is obtained. The most effective way to do this is to reduce the contact area, which can be done by increasing the curvature ratio to 1:
  • Another disadvantage of the already known device lies in the difficulty of precisely adjusting the axial position of the two forming discs.
  • the object of the invention is to create a device in which the curvature ratios indicated above are achieved and in which the desired position of the forming discs can be respected.
  • the invention achieves this objective according to the features of claim 1, in that two forming discs with coaxial axes are used, the front surfaces of which are opposite one another by disengaging a slot. In this way it is possible to keep the diameter of the forming discs substantially smaller than in the state of the art.
  • a rotary head according to the invention consists essentially of two forming discs 1 provided with rods 2 arranged coaxially.
  • the whole of the forming disc and the rod, which is mostly made in one piece, is hereinafter referred to as a rotating roll.
  • the rods 2 are guided radially by means of balls 3 held in ball cages not shown.
  • the axial positioning of each rod 2 is achieved by means of a ball 5 which rests on its end surface turned away from the forming disk 1.
  • the ball 5, which is also held in a not shown ball cage, bears against a support 6 of the rotating head. (The support 6 is formed by an element placed thereon.)
  • the balls 5 and the total length of the rotary rollers define the position of the slot and the position of the rotating profile of the forming discs.
  • Each forming disc 1 has substantially a front surface and a rotational profile, by which is meant in this application the area of the surface that shapes the edge.
  • the small dimensions of the forming rollers are seen by comparing their size with the writing tip also shown. In this way, a substantial reduction in the mass of rotating rollers, preferably made of tungsten carbide, is also obtained in comparison with the state of the art. Due to the substantial reduction in diameter to about 4 mm, the above-mentioned curvature ratio of the invention of 1: 4 and above is obtained.
  • FIG. 3 also shows a writing tip 10 in which a ball 9 is inserted, which has already slightly displaced the tongue against the force of the spring in the direction of the arrow.
  • the rotary head is always disposed above the writing tip, but this is not mandatory, the axis of rotation between the rotating head and the writing tip can also extend to the horizontal or the writing tip, in case of vertical axis of rotation, can be moved from the top into the rotating head disposed below it.
  • the position of the support 6 can also be modified by means of an adjusting mechanism (adjusting screw, setting plate, etc.), it does not need to present the circular shape illustrated in FIG. which were defined in the example as movements to the top and bottom of the writing head and the rotational movement of the rotating head can be achieved otherwise.
  • the rotating head It has been found to be advantageous for the rotating head to rotate about its main axis but not to be axially movable.
  • the writing tip does not rotate, moves axially until the writing ball comes into contact first with one side and then with the other side of the spring-loaded V-shaped tongue.
  • the writing tip advances towards the rotating head, the writing tip is brought into contact with the two forming discs and is also centered in the normal direction relative to the shaped tab.
  • the forming discs installed in such a way as to be able to freely pivot are offset in rotation by the rotation of the rotating head during the continuation of the axial movement and the deformation of the edge takes place.
  • the writing tip rests in a collet which is installed with a small radial clearance, so as to guarantee, despite geometrical defects presented by both the writing tip and by the device, that the writing tip can be centered without obstacles as described above.
  • the axial advance is made according to a controlled curve, while being limited by a fixed stop. It is also possible to limit the maximum advance force by means of an axially acting spring. This spring must first overcome the counter-force exerted by the significantly lower springs of the V-shaped tongue provided in the rotating head and then ensures the edge deformation force.
  • the forming discs are first offset in rotation by contact with the edge, with negligible slippage, which is achieved thanks to the low mass achieved in the context of the invention for the rotary rollers and their bearings as well as the Hertz pressure force between the rotating rollers and the edge.

Abstract

The invention relates to a device called a rotating head which is used to deform the edge of the points of ball-point pens (10). The inventive device comprises two rotating rollers which are installed so that they can pivot freely in the rotating head. Said rollers comprise forming disks (1) which define a slot therebetween. A tongue (8) having a V-shaped end face is disposed in said slot and can be moved against a spring. The invention is characterised in that (i) the rotating rollers can turn freely around aligned axes (11) and (ii) the slot is defined by the front surfaces of the forming disks (1).

Description

Cette invention concerne un dispositif désigné comme tête rotative pour la déformation du bord des pointes de stylos-billes, comportant deux rouleaux rotatifs installés de manière à pouvoir tourner librement dans la tête rotative, qui présentent des disques de formage qui délimitent entre eux une fente dans laquelle dépasse une languette à face frontale en forme de V pouvant être déplacée contre un ressort.The invention relates to a device designated as a rotating head for the deformation of the edge of ballpoint pen tips, comprising two rotary rollers freely rotatable in the rotary head, which have forming discs which delimit between them a slot in which protrudes from a V-shaped front face tongue that can be moved against a spring.

Lors du montage de billes dures de stylos-billes dans leur assise de la pointe d'écriture consistant en matière modelable du stylo-bille, les billes sont d'abord insérées dans un trou borgne substantiellement cylindrique et ensuite le bord de la pointe d'écriture qui dépasse au dessus de l'équateur de la bille, est bridé par déformation plastique de manière à entourer et tenir la bille dans la zone « au dessus » de l'équateur.When assembling hard balls of ballpoint pens in their seat of the writing tip consisting of moldable material of the ballpoint pen, the balls are first inserted into a substantially cylindrical blind hole and then the edge of the tip of the ballpoint pen. writing that protrudes above the equator of the ball, is flanged by plastic deformation so as to surround and hold the ball in the area "above" the equator.

Le trou dans lequel est assise la bille présente dans la zone de son fond des poches ou des rainures grâce auxquelles le liquide d'écriture, désigné ci-après comme « encre » pour simplifier, est transporté. Il ne s'agit pas non plus d'un véritable trou borgne, car à partir de son fond un alésage d'un diamètre inférieur à celui de la bille mène à la réserve d'encre.The hole in which the ball is seated has in the area of its bottom pockets or grooves through which the writing liquid, hereinafter referred to as "ink" for simplicity, is transported. It is also not a true blind hole, because from its bottom a bore of a diameter smaller than that of the ball leads to the reserve of ink.

Le bridage de la bordure est réalisé depuis de nombreuses années suivant la méthode suivante, décrite dans le document US 3,135,231 A :Border clamping has been performed for many years by the following method, described in US 3,135,231 A:

Le dispositif de bridage appelé tête rotative présente deux tiges disposées parallèlement l'une par rapport à l'autre orientées dans le sens vertical. Celles-ci supportent à leurs extrémités inférieures des disques de formage durs de forme circulaire qui vont en se rétrécissant substantiellement en cône vers le bas. L'ensemble de la tige et du disque de formage est appelé rouleau rotatif et est installé de manière à pouvoir pivoter librement. Les périphéries des disques de formage présentent un petit intervalle en forme de fente. Dans cette fente est disposée au centre une languette dure et mince à surface frontale en forme de V pouvant se déplacer axialement contre un ressort. La tête rotative peut tourner autour de l'axe de symétrie des deux arbres des disques de formage et est aussi entraînée en rotation autour de cet axe.The clamping device called rotary head has two rods arranged parallel to one with respect to the other oriented in the vertical direction. These support at their lower ends circular shaped hard forming discs which tapering substantially cone downwards. The entire rod and forming disk is called a rotating roller and is installed so that it can rotate freely. The peripheries of the forming discs have a small gap in the form of a slit. In this slot is disposed in the center a thin tongue and thin V-shaped front surface that can move axially against a spring. The rotating head is rotatable about the axis of symmetry of the two shafts of the forming discs and is also rotated about this axis.

Le mode de fonctionnement est alors le suivant : Une pointe d'écriture avec sa bille est guidée coaxialement par rapport à l'axe de rotation de la tête rotative dans la fente entre les disques de formage et la bille vient alors d'abord en contact avec la surface frontale en forme de V. Ceci assure un centrage et un positionnement sûr de la bille et de la pointe d'écriture dans le plan de la languette. La languette est ensuite décalée contre son ressort et la pointe d'écriture arrive en contact avec les disques de formage installés de manière à pouvoir pivoter librement. Ceci entraîne le centrage dans le plan normalement par rapport au plan de la languette. La compression axiale de la pointe d'écriture et de la tête rotative l'une contre l'autre se fait avec une force prédéfinie et grâce à un nombre prédéfini de rotations relatives. Le mouvement relatif entre la pointe d'écriture et la tête rotative entraîne le décalage en rotation des disques de formage. Ainsi, du fait de la force de compression et de la série de rotations, le bord des disques de formage est comprimé contre la bille, la matière modelable du bord est densifiée et étirée, ce qui crée une fente approximativement concentrique par rapport à la bille dans la zone de l'équateur. L'opération de bridage est terminée.
Cet appareil a fait substantiellement ses preuves et plus de la moitié de tous les stylos-billes fabriqués dans le monde le sont suivant ce procédé et avec de tels dispositifs.
The operating mode is as follows: A writing tip with its ball is guided coaxially with respect to the axis of rotation of the rotating head in the slot between the forming discs and the ball then comes into contact first. with the V-shaped front surface. This ensures a safe centering and positioning of the ball and the writing tip in the plane of the tongue. The tongue is then offset against its spring and the writing tip comes into contact with the forming discs installed so as to be able to pivot freely. This causes centering in the plane normally with respect to the plane of the tongue. The axial compression of the writing tip and the rotating head against each other is done with a predefined force and with a predefined number of relative rotations. The relative movement between the writing tip and the rotating head causes the rotational offset of the forming discs. Thus, due to the compressive force and the series of rotations, the edge of the forming discs is compressed against the ball, the moldable material of the edge is densified and stretched, which creates an approximately concentric crack with respect to the ball in the equator zone. The clamping operation is complete.
This device has proven its worth, and more than half of all ballpoint pens manufactured in the world are used in this process and with such devices.

Ce dispositif présente néanmoins un inconvénient qui est dû aux rapports géométriques de taille prédéfinis dans d'étroites limites des différentes pièces. Du fait des deux arbres orientés parallèlement des disques de formage, il n'est pas possible, même avec une miniaturisation extrême et en utilisant des paliers spéciaux à monter à plat dans le sens radial, d'obtenir un écart entre les deux axes de rotation qui soit inférieur à environ 10 mm. Les diamètres des disques de formage sont ainsi également fixés impérativement respectivement à environ 10 mm. La pointe d'écriture a habituellement un diamètre d'environ 0,6 à 1,2 mm dans la zone de son bord et est en conséquence fortement courbée. Les rapports des courbures pointe d'écriture :disque de formage vont ainsi d'environ 1 :16 à 1 :8. Ces rapports de taille ont pour conséquence une surface de contact relativement importante et ainsi une pression superficielle Hertz faible. Avec une pression superficielle Hertz supérieure, on obtient un meilleur « pétrissage » de la matière de la pointe d'écriture. Le moyen le plus efficace d'y parvenir consiste à réduire la surface de contact, ce qui peut être fait en augmentant le rapport de courbure jusqu'à 1 :4 par exemple.This device nevertheless has a disadvantage that is due to predefined geometric size ratios within narrow limits of the different parts. Due to the fact that the two shafts are oriented parallel to the forming discs, it is not possible, even with extreme miniaturization and using special bearings to be mounted flat in the radial direction, to obtain a difference between the two axes of rotation. which is less than about 10 mm. The diameters of the forming discs are thus also necessarily fixed respectively at about 10 mm. The writing tip usually has a diameter of about 0.6 to 1.2 mm in the area of its edge and is therefore strongly curved. The ratios of the writing tip bends: forming disc thus range from about 1: 16 to 1: 8. These size ratios result in a relatively large contact area and thus a low Hertz surface pressure. With a higher Hertz surface pressure, a better "kneading" of the material of the writing tip is obtained. The most effective way to do this is to reduce the contact area, which can be done by increasing the curvature ratio to 1: 4 for example.

Un autre inconvénient du dispositif déjà connu réside dans la difficulté de régler précisément la position axiale des deux disques de formage.Another disadvantage of the already known device lies in the difficulty of precisely adjusting the axial position of the two forming discs.

Le document US 3,135,231 A décrit également une forme de réalisation dans laquelle les deux tiges des disques de formage ne sont pas disposées parallèlement à l'axe de rotation de la tête rotative, mais en biais par rapport à celle-ci, de sorte que leurs axes se recoupent sur l'axe de rotation. Le motif de cette disposition n'est pas indiqué, elle n'est pas utilisée en pratique probablement en raison du coût élevé de la fabrication d'assises non parallèles pour les paliers des tiges.The document US Pat. No. 3,135,231 A also describes an embodiment in which the two rods of the forming discs are not arranged parallel to the axis of rotation of the rotary head, but at an angle to it, so that their axes intersect on the axis of rotation. The reason for this provision is not indicated, it is not used in practice probably because of the high cost of manufacturing non-parallel seats for the bearings of the rods.

Le but de l'invention est de créer un dispositif dans lequel les rapports de courbure indiqués précédemment sont atteints et dans lequel la position souhaitée des disques de formage peut être respectée.The object of the invention is to create a device in which the curvature ratios indicated above are achieved and in which the desired position of the forming discs can be respected.

L'invention atteint cet objectif selon les caractéristiques de la revendication 1, par le fait que sont utilisés deux disques de formage avec des axes coaxiaux, dont les surfaces frontales se situent l'une en face de l'autre en dégageant une fente. On parvient de cette façon à maintenir le diamètre des disques de formage substantiellement plus petit que dans l'état de la technique.The invention achieves this objective according to the features of claim 1, in that two forming discs with coaxial axes are used, the front surfaces of which are opposite one another by disengaging a slot. In this way it is possible to keep the diameter of the forming discs substantially smaller than in the state of the art.

L'invention est expliquée plus précisément ci-après sur la base du dessin. On voit en

  • figure 1, une vue schématique d'une tête rotative selon l'invention,
  • figure 2, une vue schématique du dessus du dispositif de la figure 1, et
  • figure 3, un détail à l'échelle agrandie.
The invention is explained more precisely below on the basis of the drawing. We see
  • FIG. 1, a schematic view of a rotary head according to the invention,
  • FIG. 2, a schematic view from above of the device of FIG. 1, and
  • Figure 3, a detail on an enlarged scale.

Comme on le voit en figure 1, une tête rotative selon l'invention consiste essentiellement en deux disques de formage 1 munis de tiges 2 disposées coaxialement. L'ensemble du disque de formage et de la tige, qui est la plupart du temps réalisé en une pièce, est désigné ci-après comme rouleau rotatif. Les tiges 2 sont guidées radialement au moyen de billes 3 maintenues dans des cages à billes non représentées. Le positionnement axial de chaque tige 2 est réalisé au moyen d'une bille 5 qui repose sur sa surface terminale détournée du disque de formage 1. La bille 5, qui est également maintenue dans une cage à bille non représentée, s'appuie contre un appui 6 de la tête rotative. (L'appui 6 est formé par un élément posé dessus.) Les billes 5 et la longueur totale des rouleaux rotatifs définissent la position de la fente et la position du profil rotatif des disques de formage.As seen in Figure 1, a rotary head according to the invention consists essentially of two forming discs 1 provided with rods 2 arranged coaxially. The whole of the forming disc and the rod, which is mostly made in one piece, is hereinafter referred to as a rotating roll. The rods 2 are guided radially by means of balls 3 held in ball cages not shown. The axial positioning of each rod 2 is achieved by means of a ball 5 which rests on its end surface turned away from the forming disk 1. The ball 5, which is also held in a not shown ball cage, bears against a support 6 of the rotating head. (The support 6 is formed by an element placed thereon.) The balls 5 and the total length of the rotary rollers define the position of the slot and the position of the rotating profile of the forming discs.

Chaque disque de formage 1 présente substantiellement une surface frontale et un profil rotatif, par lequel on entend dans cette demande la zone de la surface qui façonne le bord. On voit les petites dimensions des rouleaux de formage en comparant leur taille avec la pointe d'écriture également représentée. On obtient ainsi également une réduction substantielle par rapport à l'état de la technique de la masse des rouleaux rotatifs composés de préférence de carbure de tungstène. Du fait de la réduction substantielle du diamètre à environ 4 mm, on obtient le rapport de courbure mentionné ci-dessus visé par l'invention de 1 :4 et plus.Each forming disc 1 has substantially a front surface and a rotational profile, by which is meant in this application the area of the surface that shapes the edge. The small dimensions of the forming rollers are seen by comparing their size with the writing tip also shown. In this way, a substantial reduction in the mass of rotating rollers, preferably made of tungsten carbide, is also obtained in comparison with the state of the art. Due to the substantial reduction in diameter to about 4 mm, the above-mentioned curvature ratio of the invention of 1: 4 and above is obtained.

Entre les surfaces frontales opposées l'une à l'autre, dépasse une languette 8 chargée par ressort dans le sens axial (flèche vers le bas en figure 1), dont on aperçoit très bien la surface frontale configurée en forme de V notamment en figure 3. La languette 8 est guidée au moyen d'une tige 7, dont elle forme l'extrémité avant. On voit aussi en figure 3 une pointe d'écriture 10 où est insérée une bille 9, qui a déjà un peu déplacé la languette contre la force du ressort dans le sens de la flèche.Between the opposite end faces to each other, protrudes a tab 8 loaded by spring in the axial direction (downward arrow in Figure 1), which is clearly seen the front surface configured in V shape in particular in Figure 3. The tongue 8 is guided by means of a rod 7, which it forms the front end. FIG. 3 also shows a writing tip 10 in which a ball 9 is inserted, which has already slightly displaced the tongue against the force of the spring in the direction of the arrow.

L'épaulement à la transition entre la tige 7 et la languette 8 se trouve en figure 1 sur la périphérie des disques de formage 1, les disques de formage sont immobiles. En figure 3, cet épaulement est déjà un peu relevé et permet, lors de la poursuite du mouvement de la pointe d'écriture 10 dans le sens de la flèche jusqu'au contact avec les disques de formage, la rotation de ceux-ci.The shoulder at the transition between the rod 7 and the tongue 8 is in Figure 1 on the periphery of the forming discs 1, the forming discs are immobile. In FIG. 3, this shoulder is already raised slightly and, during the continued movement of the writing tip 10 in the direction of the arrow until it comes into contact with the forming discs, rotates them.

En phase finale du mouvement relatif entre la pointe d'écriture et la tête rotative, la déformation plastique du bord a lieu tout en formant la fente à encre connue courbée, concentrique à la bille 9, mentionnée en introduction.In the final phase of the relative movement between the writing tip and the rotating head, the plastic deformation of the edge takes place while forming the known curved ink slot, concentric with the ball 9, mentioned in the introduction.

L'invention ne se limite pas à l'exemple de réalisation présenté, mais peut aussi être modifiée et organisée différemment comme defini dans les revendications. Dans la description, la tête rotative est toujours disposée au dessus de la pointe d'écriture, mais ceci n'est pas obligatoire, l'axe de rotation entre la tête rotative et la pointe d'écriture peut aussi s'étendre à l'horizontale ou la pointe d'écriture, en cas d'axe vertical de rotation, peut être déplacée à partir du haut dans la tête rotative disposée en dessous d'elle. La position de l'appui 6 peut également être modifiée au moyen d'un mécanisme de réglage (vis de réglage, plaquette de calage, etc.), elle n'a pas besoin de présenter la forme circulaire illustrée en figure 2. Les mouvements qui étaient définis dans l'exemple comme des mouvements vers le haut et vers le bas de la tête d'écriture et le mouvement de rotation de la tête rotative peuvent être réalisés autrement. Il s'est avéré avantageux que la tête rotative tourne autour de son axe principal mais ne soit pas mobile dans le sens axial. La pointe d'écriture ne tourne pas, se déplace axialement jusqu'à ce que la bille d'écriture arrive en contact d'abord avec un flanc et ensuite avec l'autre flanc de la languette en forme de V chargée par ressort. Lors de la poursuite de l'avance de la pointe d'écriture vers la tête rotative, la pointe d'écriture est mise en contact avec les deux disques de formage et est également centrée dans le sens normalement par rapport à la languette en forme de V. Enfin, les disques de formage installés de manière à pouvoir pivoter librement sont décalés en rotation grâce à la rotation de la tête rotative lors de la poursuite du mouvement axial et la déformation du bord a lieu.The invention is not limited to the embodiment shown, but may also be modified and organized differently as defined in the claims. In the description, the rotary head is always disposed above the writing tip, but this is not mandatory, the axis of rotation between the rotating head and the writing tip can also extend to the horizontal or the writing tip, in case of vertical axis of rotation, can be moved from the top into the rotating head disposed below it. The position of the support 6 can also be modified by means of an adjusting mechanism (adjusting screw, setting plate, etc.), it does not need to present the circular shape illustrated in FIG. which were defined in the example as movements to the top and bottom of the writing head and the rotational movement of the rotating head can be achieved otherwise. It has been found to be advantageous for the rotating head to rotate about its main axis but not to be axially movable. The writing tip does not rotate, moves axially until the writing ball comes into contact first with one side and then with the other side of the spring-loaded V-shaped tongue. As the writing tip advances towards the rotating head, the writing tip is brought into contact with the two forming discs and is also centered in the normal direction relative to the shaped tab. Finally, the forming discs installed in such a way as to be able to freely pivot are offset in rotation by the rotation of the rotating head during the continuation of the axial movement and the deformation of the edge takes place.

Dans une forme de réalisation privilégiée de l'invention, la pointe d'écriture repose dans une pince de serrage qui est installée avec un faible jeu radial, afin de garantir ainsi, malgré des défauts géométriques présentés aussi bien par la pointe d'écriture que par le dispositif, que la pointe d'écriture puisse être centrée sans obstacles comme décrit ci-dessus.In a preferred embodiment of the invention, the writing tip rests in a collet which is installed with a small radial clearance, so as to guarantee, despite geometrical defects presented by both the writing tip and by the device, that the writing tip can be centered without obstacles as described above.

L'avance axiale se fait suivant une courbe commandée, tout en étant limitée par une butée fixe. Il est possible de limiter en plus la force maximale d'avance au moyen d'un ressort agissant axialement. Ce ressort doit d'abord surmonter la contre-force exercée par les ressorts nettement plus faibles de la languette en forme de V prévus dans la tête rotative et garantit alors la force de déformation du bord.The axial advance is made according to a controlled curve, while being limited by a fixed stop. It is also possible to limit the maximum advance force by means of an axially acting spring. This spring must first overcome the counter-force exerted by the significantly lower springs of the V-shaped tongue provided in the rotating head and then ensures the edge deformation force.

Il est essentiel que les disques de formage soient d'abord décalés en rotation par contact avec le bord, avec un glissement négligeable, ce qui est obtenu grâce à la faible masse atteinte dans le cadre de l'invention pour les rouleaux rotatifs et leurs paliers ainsi qu'à la force pression Hertz entre les rouleaux rotatifs et le bord.It is essential that the forming discs are first offset in rotation by contact with the edge, with negligible slippage, which is achieved thanks to the low mass achieved in the context of the invention for the rotary rollers and their bearings as well as the Hertz pressure force between the rotating rollers and the edge.

Claims (6)

  1. A rotating head for deforming the edge of ballpoint-pen nibs, comprising two rotating rolls installed in such a way as to be able to pivot freely in the rotating head, which have forming disks (1) that define between themselves a gap through which extends a tongue (8) comprising a V-shaped front face that can be moved against a spring, which head is characterized in that the rotating rolls can rotate freely about coaxial axes (11) and that the gap is defined by the front surfaces of the forming disks.
  2. The rotating head as claimed in claim 1, characterized in that the axial position of each rotating roll is defined by a respective bearing surface (6) of the rotating head.
  3. The rotating head as claimed in claim 2, characterized in that the position of the bearing surface (6) is adjustable.
  4. The rotating head as claimed in one of the preceding claims, characterized in that the tongue (8) is part of a rod (7) and in that at least one shoulder on the rod rests, under the force of the spring, on the periphery of at least one of the forming disks (1).
  5. The rotating head as claimed in claim 4, characterized in that when the V-shaped tongue (8) is in the rest position, the axial distance between the flanks of the V-shaped profile and the forming disks ensures that the ball (9) touches both flanks of the V-shaped profile before the edge (12) of the nib (10) comes into contact with the forming disks.
  6. The rotating head as claimed in one of the preceding claims, characterized in that the support of the nib (10) has a radial play of not more than 0.2 times the diameter of the ball (9).
EP03729503A 2002-01-10 2003-01-10 Rotating head Expired - Fee Related EP1463639B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03729503A EP1463639B1 (en) 2002-01-10 2003-01-10 Rotating head

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP02450004 2002-01-10
EP02450004A EP1327532A1 (en) 2002-01-10 2002-01-10 Spinner head
EP03729503A EP1463639B1 (en) 2002-01-10 2003-01-10 Rotating head
PCT/FR2003/000075 WO2003059648A1 (en) 2002-01-10 2003-01-10 Rotating head

Publications (2)

Publication Number Publication Date
EP1463639A1 EP1463639A1 (en) 2004-10-06
EP1463639B1 true EP1463639B1 (en) 2006-09-06

Family

ID=8185860

Family Applications (2)

Application Number Title Priority Date Filing Date
EP02450004A Withdrawn EP1327532A1 (en) 2002-01-10 2002-01-10 Spinner head
EP03729503A Expired - Fee Related EP1463639B1 (en) 2002-01-10 2003-01-10 Rotating head

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP02450004A Withdrawn EP1327532A1 (en) 2002-01-10 2002-01-10 Spinner head

Country Status (11)

Country Link
US (1) US7007533B2 (en)
EP (2) EP1327532A1 (en)
JP (1) JP4436680B2 (en)
CN (1) CN100358734C (en)
AU (1) AU2003235710B2 (en)
BR (1) BR0306814A (en)
CA (1) CA2472356C (en)
DE (1) DE60308142T2 (en)
ES (1) ES2272997T3 (en)
MX (1) MXPA04006723A (en)
WO (1) WO2003059648A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108515787B (en) * 2018-04-28 2019-07-26 重庆工业职业技术学院 A kind of manufacturing writing brush device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2498009A (en) * 1947-06-27 1950-02-21 Hartley Pen Company Method of and apparatus for assembling ball-pointed writing instruments
US2992572A (en) * 1958-06-02 1961-07-18 Parker Pen Co Ball point spinning tool
AT232356B (en) 1960-07-22 1964-03-10 Friedrich Schaechter Device for producing the curved, lateral annular gap around the writing ball of ballpoint pens
US3099082A (en) * 1960-11-15 1963-07-30 Henriksen Ernst Johan Jens Method of making writing tips for ball point pens
FR2379386A1 (en) * 1977-02-02 1978-09-01 Albe Sa DEVICE TO EDGE POINTS FOR BALLPOINT PENS
GB2016333B (en) * 1977-11-29 1982-03-10 Albe Sa Device for retaining the ball in the ball-point pen
CH657095A5 (en) * 1984-04-26 1986-08-15 Buzzi & Co S A DEVICE FOR REBEADING TIPS FOR BALLPOINT PENS.
JPS623841A (en) * 1985-06-28 1987-01-09 O S G Kk Method and apparatus for producing tapered parts

Also Published As

Publication number Publication date
AU2003235710B2 (en) 2008-02-28
ES2272997T3 (en) 2007-05-01
MXPA04006723A (en) 2004-10-04
JP2005514250A (en) 2005-05-19
JP4436680B2 (en) 2010-03-24
EP1327532A1 (en) 2003-07-16
BR0306814A (en) 2004-12-28
CA2472356A1 (en) 2003-07-24
AU2003235710A1 (en) 2003-07-30
US20050034498A1 (en) 2005-02-17
US7007533B2 (en) 2006-03-07
WO2003059648A1 (en) 2003-07-24
DE60308142T2 (en) 2007-08-02
CN100358734C (en) 2008-01-02
EP1463639A1 (en) 2004-10-06
CA2472356C (en) 2011-04-05
CN1615227A (en) 2005-05-11
DE60308142D1 (en) 2006-10-19

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